The difference of downforces between “20mm x 20mm” and “10mm x 10mm” is
slightly smaller than that between “Control” and “20mm x 20mm”

Much smaller size of square holes like 5mm x 5mm needs meshes to be smaller by one step more.
Therefore, at the present stage, I test aerodynamic devices about the sidepod and radiator
with the radiator model of 10mm size square holes.